Name: 1/2 Twin Hammer Impact Wrench Model: AT-231 Free Speed: 7500rpm Max Torque: 400ft-lb Air Inlet: 1/4" Air Pressure: 90psi Weight: 2.7kg Name: 1/2 Twin Hammer Impact Wrench Kit Model: AT-231A Air Pressure: 90psi Free Speed: 7500rpm Air Consumption: 4cfm Max Torque: 400ft-lb Air Inlet: 1/4BSP Weight: 2.2kg 1PC Nipple 1PC Oil Pot 10PCS Sockets 1PC Extension Bar